Here is an idea I had once, but I haven't had a chance to try:
Heat an empty coffee can or similiar metal, circular object on the stove. Medium heat should be good. Make sure you allow enough time for it to fully heat up (10 min?) Then, carefully burn the hole using the bottom of the can with the head against some plywood or other non burnable flat surface. Make sure the head is lying flat and this should work. Please try it on an old head first to see if it works. As I said : I Have Not Tried This !!! But in theory, it should make a nice hole with no tears. Let me know how it goes.